Door.



J. B. HUNTER & C. H. CHAMBERS.

DOOR.

APPLIaATIoN FILED JAN. 1s. 1909.

Patented Dec. 19, 1911` O o o O l..." i@W1 lil" Illho ./o o l" o .l'o o @Wh-VWO) o our@ 0* "CSW o o MMO .H O O (9 o `1 0"' o o 01.* NMO 1; G Il /8 /8 l lo /8 7 Mmm mu /2 www www cnl,u.\\m.\ PLANOGRAPH co., WASHINGTON. n. C.

may concern:

n that we, JAMES BURDELL CARLTON H. CHAMBERS, both e United States, residing, re-

Hamilton, in the county of ayton, in the county of Montj of Ohio, have invented ceruseful Improvements in Doors,

"l following is a specification.

ion relates to doors and parc'losure for the smoke chamber of tives or to a closure for similar con ons, and the method of secur' ing the s The c of the invention is to simplify as well as the means and mode `gio the smoke chamber closures s, whereby they will not only in construct-ion, but will be easily operated, and unlikely repair. v

ve primary and other incis in view, as will more fully e specification, the invention e means, mechanism, features j, the parts and combinations im. he mode of operation, as herej bed and set forth in the claims.

nown in locomotive engineerthat it is quite essential that the smoke chamber located at d of the locomotive boiler be tially air-tight. If the smoke ire is not air-tight the engine earn properly, and considerlnd annoyance will be caused. t has been customary to secure the smoke chamber by clamps ich prevented ready access to hamber. On account of the removing and replacing the er closure, the smoke chamber y not received the proper ateby resulting in trouble and dental appear consist o provide a closure which may d quickly adjusted or removed, ill render the smoke chamber air-tight.

to the drawings, Figure 1 is of a locomotive showing the e smoke chamber closure. Fig. or view of the operated parts Specification of Letters Patent.

primary objects of the present re, the bolts being in their sTATEs PA TENT ernten.

Y ELL HUNTER, or HAMILTON, AND CARLTON H. CHAMBERS, or DAYTON,

oHIo.

DOOR.

Patented Dec. 19, 1911.

Application filed January 18, 1909. Serial No. 472,973.

innermost position, as when the door is unlocked. Fig. 3 is a similar view showing the bolts in their extended position. Fig. 4f is a sectional detail view through the closure and boiler head. Fig. 5 is a detail perspective View of one-half of the bolt guide or keeper and the bolt removed from said guide or keeper. Fig. 6 is a detail view of the locking device for securing the bolt-s of the closure in their locked 4position.

Like parts are indicated by similar characters of reference throughout the several views.

Referring to the drawings, 1 is the head of the locomotive boiler which is provided with ay man-hole closed by a closure plate or door 2. The closure 2 is preferably hinged to the head 1 as at 3. The door 2 is provided with a peripheral iiange t bearing upon the outer side of the head 1 and drawn tightly into contact therewith by the locking means to be described. Secured to the inner side of the door 2 is a housing 5 provided with a plurality of radial guides or keepers 6 in which are mounted radially movable bolts or locking bars 7. The guides or keepers 6 may be either dovetailed in form or may comprise guides engaging the bolts or locking bars 7, but are preferably a combination of these forms as shown in Fig. 5. The keeper or guide as shown in Fig. 5 is dovetailed throughout the outermost portion as at 8, while at the inner part is provided a projecting lip 9. The locking bar 7 is correspondingly beveled on its outer face as at 10 while adjacent to the rear portion thereof are recesses 11 engaged by the lip 9 of the keeper 6. The outer eX- tremity of the locking bar 7 is provided with an inclination or bevel face 12 adapted to engage the head 1 about the edge of the man-hole as hereinafter mentioned. Con. centrically mounted in the housing 5 `is a revoluble actuating disk 13 provided with a stem or shaft 14: extending beyond the closure door 2 and having a square head 15 for the reception of a wrench or spanner by which the actuating disk 13 may be rotated. Links 16 are pivoted at one end to the revoluble disk 13, and at the opposite end to the loking bars 7 at a point substantially midf to move outward within their guides 6 and to be projected radially beyond the housing 5 as shown in Fig. 3.

The locking bars 7 are of such length that in their innermost position or that shown in Fig. 2 the inner ends of the locking bars will contact the revoluble disk 13, and thereby limit the movement of the locking bar 7 and by the attachment of the links 16 therewith will also limit the revoluble movement of the disk 13. Projecting lugs 17 are provided on the keepers or guides 6 which are engaged by the links 16 when the locking bars 7 have reached their outermost position, and thereby limit the further movement of the looking bars and disk 13. 1t is obvious that after the links 16 have assumed a radial position as shown in Fig. 3, if the disk was further rotated, the locking bars 7 would tend to move inward. This is eliiectually prevented by the engagement of the links 16 with the said lugs 17. The housing 5 containing the locking mechanism is secured to the closure door 2 by studs or bolts 18. The adjustment of the parts is such that when the smoke chamber door 2 is closed and the disk 13 is rotated. by means of the shaft lto thrust the locking bars '7 outward, the inclined faces 12 of the locking bars 7 will engage the edge of the manhole as shown in Fig. 4, and by their movement will draw the smoke chamber door 2 tightly against the head 1. lt is obvious that the greater the inclination 12 of the locking bars 7 the greater will be the drawing action of the door. However, it is not necessary that the angle of such inclined surface 12 be great. It has been found in practice, that with fairly close adjustment of the door at the time of its manufacture a comparatively slight angle will eifectually draw the door into close contact with the head 1, making a particularly air-tight closure. However, this drawing action is an essential feature. 4

1n order that the locking bars may not become disengaged through the constant jarring and jolting of the engine while running, means is provided for locking the disk 13 against rotation and comprises a disk 19 secured upo'n the shaft 111 on the outer side of the door 2. The disk 19 is provided with a notch 20 engaged by awithdraw the locking bars 7 from their engagement with the head 1.

ln order that the locking mechanism may be protected from the flame and fine cinders, soot and products of combustion, a shield plate 25 is attached to the inner side of tho head 1 and projects over the outer ends of the locking bars 7 in their extended position, forming between said shield plate 25 and the head 1 a recess 26, into which the said locking bars extend.

While the closure forming the subjectmatter hereof has been described as applied to the smoke chamber of locomotives, it is to be understood that it is applicable to other structures, as for instance, oil storage tanks, or tank cars, and similar purposes.

From the above description it will be apparent that there is thus produced a closure for chambers which may be readily engaged and disengaged, and which, when in engagement with the chamber will tend to draw the closure or door into close contact, thus making the Chamber practically air-tight, and which possesses the other features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportion, detail construction, and arrangement of parts, without departing from the principle involved or sacrificing any of its advantages.

Having thus described our invention we claim:

1. 1n a device of the character described, the combination with a chamber having an opening therein, of a closure therefor comprising a housing, having inner and outer walls, the inner walls being of less area than the chamber opening, the outer wall being of greater extent than the inner wall and extending beyond the periphery of the opening, the inner and outer walls being so located as to provide an intervening space, a plurality of radially disposed guides located within the said space, a plurality of locking bars reciprocating within the said guides, the extremities of the bars being tapered and adapted to engage the inner side of the chamber wall adjacent to the opening and by their cam action to draw the extended portion of the outer wall of the closure into contact with the outer side of the chamberl wall, actuating means for the bars, a false wall on the inner side of the chamber wall surrounding the opening and forming an intermediate space within which the locking bars project, the said false wall and inner wall of the closure coperating to cover the locking bars and actuating mechanism and to protect said parts from the contents of the chamber.

2. In a construction as described, the combination with a chamber having a man hole therein, of a closure therefor, a plurality of radially movable locking bars on said closure, s for said locking bars the ich are dovetailed or formed sides throughout a portion of nd provided With overhangprojecting lips throughout of their length, the locking iclined sides corresponding to uides, and further having in- 1eeesses corresponding to the ting lips of the guides, and procati-ng said locking bars in ibstantially as specified.

truction as described, the coma chamber having a man hole losure therefor, a plurality of ble locking bars on said clo- Xtremities on said locking bars gage the edge of said man hole, tuating member, independent ng each of said locking bars tting member, said bars being 1 that they Contact the actuathen in their innermost posilimited in their movements ecting lugs on the inner face e adapted to be contacted by iereby the movement of said ving bars Will be limited when irs reach their outer most positions and means to rotate said actuating member, substantially as specified.

4:. In a construction as described, the combination With a chamber having a man hole therein, of a closure therefor, a plurality oi' radially movable locking bars on said closure, a revoluble actuating member, links connecting each of said bars vvith said actuating member Whereby the bars Will be simultaneously operated, the stem of said actuating member projecting through said closure, a disk secured on said stem and having a notch therein, a spring actuated pavvl adapted to engage said notch to prevent the rotation of said disk, a lever, an eccentric head on said lever engaging said paWl and adapted When operated to lift said paWl from the notch in said disk and hold said paWl out of engagement therewith, substantially as specified. Y

In testimony whereof, We have hereunto u set our hands this 8th day of January A. D. 1909.

JAMES BURDELL HUNTER. CARLTON H. CHAMBERS.

Witnesses:

HARRY F. NOLAN, MABEL B. CARR.

atent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

